Cultivator or other agricultural implement



Se t. 12, 1933. L. J. R. HASSELBERG 5,

CULTIVATOR OR OTHER AGRICULTURAL IMPLEMENT v Filed Oct. 8, 19:52

=1 1 v I Fig-1 Patented Sept. 1933 on new AGRIC L URAL} Q CULTIVATOR 7 1,926,619 PCEJ .Linus Johan Reinhold HasselbergfKrappm-up,

Sweden I 1' Application October 8, 1 932, ,Serial l Io. i63 6,923, j H

and in Sweden October 12;;1931 '4 Claims. (01; 979-184) 1 I In Cultivators and other agricultural implements provided with a number of'tines or other Jmembers for working the soil it is known to-arrange said times or ;other-members upon pivotal arms and to connect said arms with each other by means of awire or the like in such a manner gas -to enable the armcarrying said tine, whenencountering an obstruction; toswing backwards by forcing the other tines or. one or more of them encountering less resistance to swing forwards by the intermediary of thewire. Saidarrangement shows importantdisadvantages, in the first place 'by the .fact that the normal working position of the tines becomes vague or, mother terms, that a normal working position, of the tinesfis not. attained, especially when working a-hard'soil or a .soil having'alarge quantity of weeds where the resistance encountering the tinesis permanently varying, a normal working position. of .the

tines beinginecessary in order to make the tineswork in a satisfactory manner.

Especially in cultivators pulled by tractors, itis desirable to make thetines pivotal in a backward direction when certain of them happen to encounter fixed obstructions or an abnormal resistance; so as to enabie said tines to slide over said'obstruction without becoming injured and without subjecting the implement to alltoo heavystresses, said tine then returning to its normal working position. r

The object of the prevent invention that of securing such a resiliency of the tines independent of "each other that the swinging .backwardsof certain of said tines has norinfluence upon the working position of the other tines, the normal working position of the tines thus being a positive one. Furthermore, by such arrangement an accommodation of the force by which the tines are retained in their normal working positions is automatically obtained, 'inaccordance with the average resistance encounteringthe tines.- i' v A preferred embodiment of the invention is illustrated in the accompanying drawing, where v in accordance with the inventionywhereas x Fig. 2" is a side elevation'of said cultivator.

' Around said shafts 4, the arms 3' arerotatable in a backward-direction in order, to permit the; tines to 'slideover fixed, obstructions or the like.

The arms 3 are extendedbeyond the shafts 4 and,:at;the ends'opposite to thosecarryingthe In the drawing, 1' is'the frame-work, said frame -work being-constructed "in any suitable manner andlmounted upon'wheels 2 insuch a manner as to :be capableofibeing raised. and low-" cred, as known per se.. a

The arms 3 carrying the tines. .or othenmembers for working the soilareep'ivotally. mounted upon; shafts 4 mounted. in the frame-work.

arms 3 ,in engagement with thes'tops 7, andthe plement. Y In the embodiment shown in the draw- .ing the lever 9 is -pivotally connected with the frame-work .1-.

Fig. 1. is a plan view "of an improved cultivator tines,.:said=arn1s are provided with pulleys 5 for awire or'cabl'e 6,- said,wirejor cable being arranged in such aamanner as. to press the arms=3 forwardly by the tension-of said wire or cable 6. However, the rotation. of the arms 3 in afforwar d direction is limited by suitable stops 7, for instance consisting of rods secured to the frame work in parallel with the shafts .Thus-the ten sion of. the wire orcable 6, tendsto maintain the tinesare in their correct working position ;w hen the arms sare in engagement with the stops 7.}

; Forethe purpose of securing the tension of the cab is ne t dt eme- 9 81 i t implerneri-tbyaleverQ or the like in such-a manner as .to transmit to the .wireor-cable 6; a share of the. pulling forcenecessary for moving "the im frame at its lower end, -and is normally inclined ,wire or cable,;6 during operation, L said wire or forwardly at a suitable angleto the vertical when :all of thearms 3,0f the tinesare in engagement with the stops ,7. The tughook 8 isconnected with the lever 19 at a point betweenitspivot and the point at which the; wire or cable 6 is con nected to said lever. The point of connection of the tughook to the lever 9 or of the wire 6 to said lever 9,or both said points, may be; adjustable along said lever 9. Preferably, the wire or cable 6-is1endless and passed around 'aswell the .pu1leys 5 connected to the arms 3 as around a pulley 10 connected to the lever 9, and alsopasse d around guide pulleysll which may be necessary and which are, connected to the sidesof the The amount of tractive power at thetugehook 8 necessary for moving the implement depends upon ,the average. resistance en'counteringthe .tines, and through theflev'er 9 such ashare of thetensile strain arisingfrom-said tractive power is transmitted to the wire or cablefi asto enable all of the arms 3 to be maintained in'their normal positions in engagementwiththe stops 7., Only :when a-tine is encounteringan abnormal resistance, such'as a fixed stone or the like, the arm carrying said tine swings backwards around its shaft by overcomingthetensionl; of the wire or cable 6 so as tomake the lever 9 rotate somewhat in a. backward direction During said -move- 'ments .-the positions of operation of the other. 'tines are not changed, and as soon as the tine encounteringthe obstruction has slidden over said obstruction, it -immediately returns to ;its correct position, the-Position of operation of the 1 other times nbtbeingchanged; f When the average resistance" against 'the tinesis increased an in- :creasedtensionis automatically l effected in the v wireor cable 6,'the.tines thus being resiliently '9':-

re s n i h r o ectw ins s tion to'pass around the 'puneys connected with said What I claim and desire to secure by Letters fPatent is:-1-

1. A cultivator or other agricultural implement having a frame-work, arms pivotallymounted in said frame-work, tines or other membersof working the soil mountedupon said arms, pulleys connected with said arms, awireor cable mounted to pass around said pulleys and adapted to maintain thearms in a normal positionpfworb ing but to yield to the arm of a tine-encountering an abnormal resistance so asto permit said arm of swingingbackwards, fixed stopspredetermin ing said normal position of working of the arms by limiting the rotation or swinging of saidlarms in a forward direction, a lever pivoted to the frame-work of'the implement, at tug-hook piv-- oted to said lever, said wirefor cable, for the purpose of retaining the tines in their normal position, being connectedto said lever in such a manner as to transmit to the wire or cable, through said lever, a not very large share of the tractive power necessary for advancing'the implement in order toj'cause a tensile strain at the wirecr cable varying with said tractive'power at the tug-hook, the larger share or said tractive power being transmitted through the intermediary of said lever to the "frame-Work of the implement, "the total arrangement'being such as [to permit the" arms carrying tines encountering an abnormal resistance of swinging backwards, the otheriarms. remaining in their-position of working predetermined by said aforementioned stops.-

' 2, A cultivator or other agricultural implement having a irame-work; '1 arms pivotally mounted in said irame work, {mines or other r'nexn'bersbf working the soilmounted upon said arms, pulleys jconne'ctedwith said arms ev r pivoted to the frame-work or the implement, a pulley connected withsaid lever, an endlesswire or cable mounted arms and also aroundthe pulley connectedwith said lever and adapted to maintains'aidarms in a normal positionof vvorkingfbut toyield'to the arm of "a tine encountering an abnormal resistance so as topermit said arm orswmging backwards, fixed stops" predetermining sa'i'd'normal position of working of the arms'by 'llimiting the rotation or'lswingiing of'said arms in a for-' ward direeuon, a tug-hookfpivote'd to said lever, said endless wire or cable, for the purpose of retaining the tines in their normal position, being connected to said lever in such a manner as to transmit to-the endless wirefor'j cable, throlfghl 'sai'd' lever, a'not'very large share 'of tl'igi tractive power necessaryfor advancing thimplement, in -forder to causefa tensile strain at; the endlesswire or cable varying with' saidtractive ower" at the 6 -tug-hook, the larger share'of said tractive'power i T'determined" by said aforementioned stops.

being transmitted through the-intermediary of said lever to the framework of the implement,

the total arrangementbeing such as to permit the arms car ying tines encounteringan i abnor- 'mal resistance of swinging backwards the other I "arms remaining in their positionoifworking "pre 3. A cultivato'r'or otheragricultural implement "having a framework, arms pivotallt rnounted in said frame-work, tinesfior other 'memb'ers" of 'working the soilmountedi up'on said arms, pulleys-connected with isaid arms, a'wire or"cab1e mounted to pass around 'said'pulleys andadapted to maintain saidarm'slin normal' positiontjof working; but to yield tothe arm of a tine en-t countering an abnormal resistance so as to per-'- position, beingv connected to saidleverat a point apower necessary for ,advancing'the implement,

the leverandthe'endless wire or cable being dis:- placeable along portions-of the lever, the larger znit saidarmpof, swinging backwards, fixed stops predetermining said normal position of working of the arms by limiting the rotation or swinging fof said arms in a forward direction, a lever pivoted to the framework of the implement at the lower end of said lever and normally, 1. e. when all Qthetines are in their normal position of working, inclined forwardly at a suitable angle to the vertical, a tug-hook pivoted to ,said lever at a point above the. pivot of the lever, said wire tractive power necessary'for advancing the implement,'.in' orderto cause aftensile strain at the wire orv cable varying with said 'tractive power'at the tug-hook, said points of connection between the lever and the'tug-hook and between the lever and the. wire or cable beingdisplaceable along ,portions of the-lever, the larger share of said Jtractive: power being transmitted through the intermediary of said lever to the frame-work 00 of the implement, the total arrangement-being "such as to permit the arms carrying tines encountering anabnormal resistance of swinging backwards, theother arms remaining in'their .po-

sition'ofworking predetermined'by said aforementioned stops.

ijA cultivatorior other agricultural implement having azframe-work, arms pivotally mounted in said frame-work, tines or other members of working the soil mounted uponsaid arms, pul- I10 leysxco'nnected .with said arms, .a lever pivoted to the frame-work of the implement at the lower end ofsaid lever and normally, i. e; when all the tines are in theirnormal position ofworking,

inclined forwardly at a suitable angle to the ver- 1115 'tical, a pulley-connected with said lever, an endless wire or-cable mountedito pass around the pulleys connected with saidarms and also around the pulley; connected with said lever and adapted to maintain said arms in the normal position of .120 wo'rking but to yield to. the arm of a tinejen-' countering an abnormal resistance so as to permit said armof swinging backwards, fixed stops *predeterminingjsaid.normal position of working ofithe. arms by limiting the rotation, or swinging 12-5 of, said arms in .aiorward direction, a tug-hook pivoted to said lever at a'point above the pivot ;,of the lever, said; endless wire or cable, for the purposeof-retaining. the tines 'in their normal above, the pointof connection between theilever andthe' tug-hook in such' a manner asto transmitto theendless wire or cable, through said lever, a not very large share of the tractive in order: to cause atensile-stra'in at the endless wire or cable varying with said tractive power at the tug-hook, said points'of connection bee tweenithe lev'e'r and-the; tug-hook and between share of 'said tractive power being transmitted ythrough.the"interrnediary"of said lever to the frame-work-of the implement, the total arrange;

.mentbeing such as 'toipermit the arms carrying tines encountering an. abnormal resistance of swinging backwards, the 1 other arms remaining said aforementioned stop's.

intheir position "of working predetermined by I LINUS Jon n REINHOLD IHASSELBERG. 

